diff --git a/bin/tests/system/notify/ns3/named.conf.in b/bin/tests/system/notify/ns3/named.conf.in
index 406418e8f3..687d9f1b2c 100644
--- a/bin/tests/system/notify/ns3/named.conf.in
+++ b/bin/tests/system/notify/ns3/named.conf.in
@@ -35,3 +35,9 @@ zone "example" {
 	# non-responsive notify recipient (no reply, no ICMP errors)
 	also-notify { 10.53.10.53; };
 };
+
+zone "notify-source-port-test" {
+	type primary;
+	file "notify-source-port-test.db";
+	notify-source 10.53.0.3 port @EXTRAPORT2@;
+};
diff --git a/bin/tests/system/notify/ns3/notify-source-port-test.db b/bin/tests/system/notify/ns3/notify-source-port-test.db
new file mode 100644
index 0000000000..221fca1ee1
--- /dev/null
+++ b/bin/tests/system/notify/ns3/notify-source-port-test.db
@@ -0,0 +1,22 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; SPDX-License-Identifier: MPL-2.0
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0.  If a copy of the MPL was not distributed with this
+; file, you can obtain one at https://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+notify-source-port-test.	SOA	mname1. . (
+					1          ; serial
+					300        ; refresh (300 seconds)
+					300        ; retry (300 seconds)
+					1814400    ; expire (3 weeks)
+					3600       ; minimum (1 hour)
+				)
+notify-source-port-test.	NS	ns2.notify-source-port-test.
+ns2.notify-source-port-test.	A	10.53.0.2
+notify-source-port-test.	NS	ns3.notify-source-port-test.
+ns3.notify-source-port-test.	A	10.53.0.3
diff --git a/bin/tests/system/notify/tests.sh b/bin/tests/system/notify/tests.sh
index dad89bd748..a96d59cb57 100644
--- a/bin/tests/system/notify/tests.sh
+++ b/bin/tests/system/notify/tests.sh
@@ -203,7 +203,7 @@ grep "sending notify to 10.53.0.5#[0-9]* : TSIG (c)" ns5/named.run > /dev/null |
 test_end
 
 test_start "checking notify-source uses port option correctly"
-grep "10.53.0.2#${EXTRAPORT2}: received notify for zone 'x1'" ns3/named.run > /dev/null || ret=1
+grep "10.53.0.3#${EXTRAPORT2}: received notify for zone 'notify-source-port-test'" ns2/named.run > /dev/null || ret=1
 test_end
 
 # notify messages were sent to unresponsive 10.53.10.53 during the tests